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Old 06-21-2011, 05:40 PM
Alexander Heinz
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

Hello!

I also have a problem with Bluetooth. I have recently bought a new USB
dongle in the store (instead of on ebay) that does not seem to have this
problem. The funny thing is that the USB IDs are identical, so the two
devices claim to be identical as well.


What also makes me wonder is the fact the MAC address of my dongle does
not seem to be unique. I have several dongles, all of them have the
address 00:1F:81:00:01:1C. Google for it and you will find more people
that have dongles with the same address.


I came across the following blog that seems to confirm that there are
fake CSR dongles on the market:

http://diy-machine.blogspot.com/search/label/Cheap%20ebay%20dongle

Is it possible that all of us have bought counterfeit dongles?

Best regards,
Alex



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Old 06-21-2011, 06:46 PM
Mark Hobley
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

--- On Tue, 21/6/11, Alexander Heinz <mailsanmich@gmx.li> wrote:

> I also have a problem with Bluetooth. I have recently
> bought a new USB dongle in the store (instead of on ebay)
> that does not seem to have this problem. The funny thing is
> that the USB IDs are identical, so the two devices claim to
> be identical as well.
>
> What also makes me wonder is the fact the MAC address of my
> dongle does not seem to be unique. I have several dongles,
> all of them have the address 00:1F:81:00:01:1C. Google for
> it and you will find more people that have dongles with the
> same address.

Yeah. Mine has that address. I bought a batch of them, so I will check the others. I planned to use them on several computers in the same building, so I hope that duplicate mac addresses is not going to be a problem.

> Is it possible that all of us have bought counterfeit
> dongles?

My mobile phone showed up as present on one of the release candidate kernels, so mine is not fake.

We could always borrow a friends laptop that runs Micros~1youknowwhat and test the dongles for operation.






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Old 06-21-2011, 07:33 PM
Alexander Heinz
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

My mobile phone showed up as present on one of the release candidate kernels, so mine is not fake.

We could always borrow a friends laptop that runs Micros~1youknowwhat and test the dongles for operation.


I am not saying that my dongle does not work at all. What I am saying is
that my dongle claims to be based on a CSR chip although it is not. The
USB IDs corresponds to CSR but the chip label says ASC AS3620QA. This is
a counterfeit.


Is very easy to tell. Just open your dongle and check the label on the chip.

Best regards,
Alex



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Old 06-21-2011, 09:07 PM
Mark Hobley
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

--- On Tue, 21/6/11, Alexander Heinz <mailsanmich@gmx.li> wrote:

> The USB IDs corresponds to CSR but the
> chip label says ASC AS3620QA. This is a counterfeit.
>
> Is very easy to tell. Just open your dongle and check the
> label on the chip.

Bloody hell Alex. I just took your advise and opened the dongle. And woah! It does say ASC AS3620QA. Presumably, these are bluetooth chips, but they do work with the CSR driver. That is a shock. I deliberately chose these dongles because they were advertised as being CSR.

I wonder if we can get an ASC AS3620QA driver (or is it likely that someone will develop one?), or have I been sold some dead ducks?

Mark.




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Old 06-22-2011, 01:51 PM
Ben Hutchings
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

On Tue, 2011-06-21 at 22:07 +0100, Mark Hobley wrote:
> --- On Tue, 21/6/11, Alexander Heinz <mailsanmich@gmx.li> wrote:
>
> > The USB IDs corresponds to CSR but the
> > chip label says ASC AS3620QA. This is a counterfeit.
> >
> > Is very easy to tell. Just open your dongle and check the
> > label on the chip.
>
> Bloody hell Alex. I just took your advise and opened the dongle. And
> woah! It does say ASC AS3620QA. Presumably, these are bluetooth chips,
> but they do work with the CSR driver. That is a shock. I deliberately
> chose these dongles because they were advertised as being CSR.

Interestingly, the Bluetooth address gives away the real manufacturer
without any need to open the dongle. The first three bytes of a MAC
address are an 'OUI' which you can look up in
<http://standards.ieee.org/develop/regauth/oui/oui.txt>. There we see:

00-1F-81 (hex) Accel Semiconductor Corp
001F81 (base 16) Accel Semiconductor Corp
1F,Mainbldg,149 Chun Xiao Road,
Shanghai 201203
CHINA

I would suspect the device manufacturer (not ASC) of fraudulently using
CSR's vendor ID. They may also be using ASC's addresses without
permission, or they may have been delegated a small block which they are
reusing repeatedly.

> I wonder if we can get an ASC AS3620QA driver (or is it likely that
> someone will develop one?), or have I been sold some dead ducks?

There is a standard USB 'device class' for Bluetooth adapters, which are
all handled by the 'btusb' driver. I don't see why ASC would
deliberately deviate from the standard, though the chip or its firmware
may have bugs.

Ben.

--
Ben Hutchings
Editing code like this is akin to sticking plasters on the bleeding stump
of a severed limb. - me, 29 June 1999
 
Old 06-22-2011, 03:07 PM
Mark Hobley
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

--- On Wed, 22/6/11, Ben Hutchings <ben@decadent.org.uk> wrote:

> There is a standard USB 'device class' for Bluetooth
> adapters, which are all handled by the 'btusb' driver.

Right. So does that mean that there is a chance that these devices might work in future? Or do we need to be shopping round for replacement adapters? If so what should we be looking for?



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Old 06-22-2011, 03:07 PM
Mark Hobley
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

--- On Wed, 22/6/11, Ben Hutchings <ben@decadent.org.uk> wrote:

> There is a standard USB 'device class' for Bluetooth
> adapters, which are all handled by the 'btusb' driver.

Right. So does that mean that there is a chance that these devices might work in future? Or do we need to be shopping round for replacement adapters? If so what should we be looking for?



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Old 06-22-2011, 03:17 PM
Ben Hutchings
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

On Wed, Jun 22, 2011 at 04:07:00PM +0100, Mark Hobley wrote:
> --- On Wed, 22/6/11, Ben Hutchings <ben@decadent.org.uk> wrote:
>
> > There is a standard USB 'device class' for Bluetooth
> > adapters, which are all handled by the 'btusb' driver.
>
> Right. So does that mean that there is a chance that these devices might work in future? Or do we need to be shopping round for replacement adapters? If so what should we be looking for?

I suggest you report the problem to the upstream Bluetooth maintainers
at linux-bluetooth@vger.kernel.org, and cc this bug address. They may
be able to find a workaround. Other than that, avoid no-name
Bluetooth dongles.

Ben.

--
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
- Albert Camus



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Old 06-22-2011, 03:17 PM
Ben Hutchings
 
Default Bug#525220: Bluetooth problem caused by fake dongles?

On Wed, Jun 22, 2011 at 04:07:00PM +0100, Mark Hobley wrote:
> --- On Wed, 22/6/11, Ben Hutchings <ben@decadent.org.uk> wrote:
>
> > There is a standard USB 'device class' for Bluetooth
> > adapters, which are all handled by the 'btusb' driver.
>
> Right. So does that mean that there is a chance that these devices might work in future? Or do we need to be shopping round for replacement adapters? If so what should we be looking for?

I suggest you report the problem to the upstream Bluetooth maintainers
at linux-bluetooth@vger.kernel.org, and cc this bug address. They may
be able to find a workaround. Other than that, avoid no-name
Bluetooth dongles.

Ben.

--
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
- Albert Camus



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